nep-25: length extension

Signed-off-by: Roman Khimov <[email protected]>

Author: roman-khimov

nep-25.mediawiki

@@ -174,6 +174,7 @@ represents all possible fields).
 {
   "type": "Integer",
   "namedtype": "name",
+  "length": 32,
   "interface": "IIterator",
   "key": "Integer",
   "value": {},
@@ -198,6 +199,13 @@ fields MUST NOT be set, except for the <code>type</code> which MUST be an
 <code>Array</code>. Value string MUST start with a letter and can contain
 alphanumeric characters and dots. It MUST NOT be longer than 64 characters.
 
+<code>length</code> is an optional field that can be used for <code>Integer</code>,
+<code>ByteArray</code>, <code>String</code> or <code>Array</code> types and
+MUST NOT be used for other types. When used it specifies the maximum possible
+byte length of an integer/byte array/string or number of array elements.
+Any of these lengths MUST NOT exceed NeoVM limitations that are relevant for
+the current version of it. Length 0 means "unlimited".
+
 <code>interface</code> is only used in conjuction with the
 <code>InteropInterface</code> <code>type</code> and MUST NOT be used for other
 types, when used it specifies which interop interface is used. The only valid
@@ -353,6 +361,14 @@ map parameters, returning an iterator with structured element type.
                   }
                }
             },
+            {
+               "name" : "Int32Field",
+               "type" : "Integer",
+               "extendedtype" : {
+                  "type" : "Integer",
+                  "length" : 4
+               }
+            },
             {
                "name" : "StringField",
                "type" : "String"